Clutch



G. AND G. H. AMONSEN.

CLUTCH.'

APPLICATION FILED JAN. 19. 1920.

1,38%,225, Patented July 12,1921

2 SHEETS-SHEET 2;

EAWI

Iv vL-A/Tofis 61L BERT AMONSEN. GEORGE H AMo/vsEM idr i i ldhlf CLUTCH.

Specification of Letters Patent.

Patented July 12,- 11.921...

Application filed January 19, 1920. Serial No. 352,306.

To all whom. it may concern:

Be it known that we, GILBE T AaroNsnN and Gnonon H. il-.M()NSEN, citizens of the United States, residing at Minneapolis, in the county of Hennepin and State of Minne sota, have invented certain new and useful Improvements in Clutches, of which the following is a specification.

Our invention relates to clutches and an object is to provide a combined "frictional and positive clutch which when operated to place it in clutching engagement acts first as a frictional clutch and changes to a positive or jaw clutch so that on starting, slipping is permitted. Another object is to provide a clutch of this character in which when the jaw clutch does the driving, the frictional clutch will hold the jaw clutch engaged so that it cannot slip out of engagement until the shifting device is operated to disen age the clutch members.

The full objects and advantages of our invention will appear in connection with the detailed description thereof: and the novel features embodied in our inventive idea will be particularly pointed out in the claims.

In the accompanying drawings, which illustrate the application of our invention in one form,

Figure 1 is a view partly in elevation and partly in section. Fig. 2 is a view mostly in longitudinal section on the line 22 of Fig. showing the device in clutching position. Fig. 3 is a view similar to Fig. 2 but showing the devicein unclutching position. Fig. is a view in section on the line -l ;-l of Fig. Fig. 5 is a view in section on the line 5 5 of Fig. 1. Fig. 6 is a view similar to Fig. 5 showing some of the parts in another position.

Referring to the particular construction shown in the drawings, 10 and 12 designate driving and driven shafts which are mounted in bearings 11 and 18, respectively. The hub 1a of a fly-wheel 16 is secured to the end or" the shaft 12 so as to extend partly beyond this shaft and permit the end or the shaft 10 to extend a short distance into the hub, as shown particularly in Figs. 2 and 3. Secured to the shaft 10 near its end is a sleeve 18 having integral arms 20 and 22. Slidably mounted on the sleeve 18 is a collar 2 which has two forwardly-extending jaws 26 and 28 which are slidable in grooves 30 and 32 formed at the enlarged end of the sleeve 18 where the arms 20 and 22 are joined thereto, as will be seen in Fig. l. The collar 2% is provided with a circumferential groove in which loosely fits a shifter ring adapted to be moved by a suitable shitting device such as will be described later. Pivotally mounted on the arms 20 and 22 are levers and 38 to the outer ends of which are secured one end of each of two band members l0 and ll, the other ends of which are secured to the arms 20 and 22. The band members surround a drum 1 2 with which the flywheel 16 is provided. The band membersare adapted to be contracted to grip this drum by the following mechanism. The inner ends of the levers 36 and 38 are provided with rollers 44 and 46 which are adapted to ride upon inclined surfaces of the jaws 26 and 28. Coiled springs 8 and 50 attached to the levers S6 and 38 normally hold the'band members 40 and 41 expanded. "When the collar 24; is slid inwardly the lever arms are moved in opposition to the tension of the springs slS and to clamp the band members at) and 41 upon the drum with frictional clutching engagement. In the position shown in Fig. 3 the shafts l0 and 12 are thus clutched irictionally so that in starting movement will be imparted gradually from one shaft to the other without shock. Upon sliding the collar 24 still farther the rollers 44C and 46 drop into grooves 52 and 5% as shown in Fig. 2, and the collar is thereby held in this position. lVhen this movement is given to the collar the jaws 26 and 28 will be advanced sufiiciently to engage lugs 56 and 58 provided on the flat surface of the fly-wheel. The two shafts will then be positively clutched together and no slippage is permitted. i lhen the clutch is used in'conne-ction withtractors or motor-vehicles the collar 2-imay be shifted by the mechanism shown in F l. The ring 3% is pivotally attache to the upper ends of a fork shifter lever 60, the lower end of which is secured to a rod 62 rotatably mounted in the frame. in arm 63 is secured to the rod 62 and a connecting rod 64: extends between the arm (53 and a foot lever 66 havinga toe portion 68 and a heel portion 70. Pressure upon the toe portion 68 causes the clutch to engage. while pressure on the heel portion 70 causes it to disengage.

The operation and advantages of our invention will be obvious from the foregoing description. When the operator moves the they are capable of sl ipping, the movement of the driving shaft is imparted gradually to the driven shaft with elimination of shocks which would otherwise occur. Upon moving the collar still farther the-jaw mem bers 26 and 28 engage the lugs 56 and; 58 and the two shafts are positively'locked together; In case the two shafts are mounted so thatthere is liability of their separating sufficiently to allow the jaw clutch to slip out of engagement, this is prevented by the engagement of the frictional clutch'members which hold the two shafts together andprevent relative longitudinalmovement thereof.

We claim E ii A clutch comprising two shafts in longitudinal alinement and" having. their ends adjacent each other, cooperating frictional clutch members secured to said shafts respectively, two arms secured toone ofsaid shafts,levers pivoted'to saidarms, a collarslidably carried by said last-mentioned shaft; jaws carried vby said collar,- said jaws having inclined surfaces which engage the inner endsof said'levers to cause-said frictionalclutch members to engagewhen slidingmovement isimparted to said collar, and lugs carried-by the other of SdldShiLftS with which said jaws engage when said collar is given a further-sliding movement. 7

2. A clutch comprising two shafts in longitudinal alinement and having their inner ends adjacent each other, a drum member secured upon= the end of one ofsaid shafts, two arms secured-to the other of-saidshafts,

levers pivoted to said-arms, two band memrberssurrounding the drum portion of saiddrum member, saidband members-having their ends secured to the'outer endsiof said levers and arms respectively, a collar slidably carried by the last-mentioned. shaft, jaws attached to said collar ,;means for causing-said jawswhen slid to operate said levers and contr act said band'members upon said drum portion, andlugs on said drum'mem her with which saidjaws engage when given a further sliding movement.

3. A clutchfcomprisingtwo shafts'in 10ngitudinal alinement and having their inner ends adjacent each other, a drum member secured-upon the endof one of said shafts,

a sleeve secured to the other of said shafts, two arms carried by said sleeve, levers pivoted to said arms, two band memberssurrounding the drum portion of said drum member, said band members having their ends secured to the outer ends of said levers and arms respectively, a collar slidably-carried bysaid sleeve, jaws carried by said collar ,saidjaws having inc-lined surfaces which'engage the inner ends 'ofsaid levers the end ofone of-said shafts, said hub re-'" ceiving the end-of the other ofsaid shafts, a fly-wheel carriedbysa id sleeve, a drum on said fiy-wheel, a-sleeve securedto the other shaft, two arms carried-by said sleeve, levers pivoted to said arms, two band-members surrounding; said drum, said bandmembers havingtheirends secured to the outer ends of said levers and arms respectively, a collar slidably CMllGCl by the -last-mentioned sleeve,

jaws carriedlby saidcollar, said jaws havinginclined surfaces which engage the inner ends of said levers to cause them-to contract said band members upon said drum when sliding movement is imparted to said collar,

springs attached to said'levers for normally,

holding said band members expanded, lugs onsardfiy-wheel with which said'jaws en gage when-said collar is givenza further sliding, movement, and meansfor holding said collar in its last-mentionedposition:

ln-testimony whereof we hereunto aifix our-signatures GILBERT AMON-SEN. GEORGE H. A-MoNsnN. 

